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Endocrine glands are also known as ________ glands. a) Small b) Ductless c) Secretory d) Target
The main constituent of Natural Gas and CNG is ________. a) Butane b) Methane c) Ethane d) Propane
Which of these is absent in an animal cell? a) Mitochondria b) Nucleus c) Cell Wall d) Cytoplasm